题目

附加要求：还要进行等价类划分测试，就是说要分别用边界值测试和等价类划分测试。

解决方法

编程语言：python
函数：
1）judge_triangle(lines, index)：判断输入的三条边是否能够成三角形。参数解释；lines（包含三条边长度数据的数组）；index：递归用的标志，表示当前正在处理第几条边。
2）kind_of_traingle(lines)：当judge_triangle(lines, index)函数中判断三条边能顾构成一个三角形，就会调用此函数判断三角形的形状（等边三角形、等腰直角三角形、等腰三角形、直角三角形和普通三角形）。
输入方式：文件输入

代码实现

import re

def judge_triangle(lines, index):
    # 判断边的情况
    if lines[index - 1] > abs(lines[(index + 3) % 3] - lines[(index + 4) % 3]):
        if lines[index - 1] < abs(lines[(index + 3) % 3] + lines[(index + 4) % 3]):
            if index == 3:
                return kind_of_traingle(lines)
            else:
                return judge_triangle(lines, index + 1)
    return "非三角形"


def kind_of_traingle(lines):
    if lines[0] == lines[1] == lines[2]:
        return "等边三角形"
    elif (lines[0] == lines[1]) or (lines[1] == lines[2] or lines[0] == lines[2]):
        return "等腰三角形"
    else:
        return "一般三角形"


if __name__ == "__main__":
    """
        边界值测试
    """
    print("边界值测试".center(45, "="))
    # 输入数据
    all_inputs = []
    # 预期输出
    target = []
    with open('data.txt', 'r', encoding="utf8") as lines:
        for i in lines:
            results = i.replace("\n", "").split(" ")
            result = [eval(results[0]), eval(results[1]), eval(results[2])]
            all_inputs.append(result)
            target.append(results[3])
    print("用例编号".center(6, " ") + "a".center(5, " ") + "b".center(5, " ") + "c".center(5, " ") + "预期结果".center(7, " ") + "实际结果".center(7, " ") + "结论".center(6, " "))
    index = 0
    for i in all_inputs:
        index += 1
        result = judge_triangle(i, 1)
        if result == target[index-1]:
            status = "pass"
        else:
            status = "fail"
        print(str(index).center(9, " ") + str(i[0]).center(5, " ") + str(i[1]).center(5, " ") + str(i[2]).center(5, " ") + target[index-1].center(7, " ") + result.center(7, " ") + status.center(6, " "))
    print("")
    """
        等价类测试
    """
    print("等价类测试".center(45, "="))
    # 输入数据
    all_inputs = []
    # 预期输出
    target = []
    # 覆盖等价类
    all_kind = []
    with open('data-1.txt', 'r', encoding="utf8") as lines:
        for i in lines:
            results = i.replace("\n", "").split(",")
            result = [results[0], results[1], results[2]]
            all_inputs.append(result)
            target.append(results[3])
            all_kind.append(results[4])
    print("用例编号".center(6, " ") + "a".center(5, " ") + "b".center(5, " ") + "c".center(5, " ") + "预期结果".center(7, " ") + "实际结果".center(7, " ") + "覆盖等价类".center(10, " ") + "结论".center(6, " "))
    index = 0
    for i in all_inputs:
        index += 1
        if (i[0] == " ") or (i[1] == " ") or (i[2] == " "):
            result = "请输入数据"
        elif re.match('[1-9]([0-9]*)?', i[0]) == None or re.match('[1-9]([0-9]*)?', i[1]) == None or re.match('[1-9]([0-9]*)?', i[2]) == None or ("." in i[0] or "." in i[1] or "." in i[2]):
            result = "输入错误"
        else:
            result = judge_triangle([int(i[0]), int(i[1]), int(i[2])], 1)
        if result == target[index-1]:
            status = "pass"
        else:
            status = "fail"
        print(str(index).center(9, " ") + str(i[0]).center(5, " ") + str(i[1]).center(5, " ") + str(i[2]).center(5, " ") + target[index-1].center(7, " ") + result.center(7, " ") + all_kind[index-1].center(10, " ") + status.center(6, " "))

运行截图